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Tsunamis begin in the middle of the ocean and gain tremendous size and power by the time they reach shore. Tsunamis can wipe out entire coastal villages or towns. Earthquakes , landslides, or volcanic eruptions can trigger waves in a nearby ocean.
To recap, the lesson provides a diagram to explain how a tsunami forms. Rapid movement of the ocean floor displaces a column of water. A series of waves travel outward and fairly low heights of around three feet.
A tsunami (soo-NAH-mee) is one of the world’s most powerful and destructive natural forces. They can speed across the ocean as fast as a jet plane, swallow up islands and wipe out villages. But what causes tsuamis…?
How do tsunamis form? Here’s how one of Earth’s most destructive forces come to be, in five steps. Luis Villazon. 1. Activation. A tsunami begins far offshore, with an earthquake, volcanic eruption or landslide. The sudden movement on the seabed displaces the water above it.
Tsunami is a Japanese word that means 'Harbour Wave'. Approximately 80% of tsunamis happen inside the Pacific Ocean’s 'Ring of Fire'. An earthquake or volcano could cause a tsunami. Tsunamis can go about as fast as 500 miles (805 kilometres an hour), nearly the same speed as a jet plane.
OBJECTIVE: For students to learn that tsunamis can be caused by earthquakes and to understand the effects of tsunamis on the shoreline. MATERIALS/RESOURCES NEEDED: 2-liter plastic soda bottles. Small gravel (fish tank gravel) Water source. Empty water bottle (16 oz) Overhead projector. Transparency of Tsunami Facts.
The immense swell of a tsunami can grow up to 100 feet, hitting speeds over 500 mph -- a treacherous combination for anyone or anything in its path. Alex Gendler details the causes of these towering terrors and explains how scientists are seeking to reduce their destruction in the future.
